Thermostatic means for operating hot-air registers.



\ A. P. BROOMELL. THERMOSTAJO MEANS FOR OPERATING HOT Am REGISTERS.

APPLICATION FILED JULY 7, 1914.

Patented Mar. 23, 1915. 9/09 gBETS-SHEET 1.

INVENTOR ATTORNEYS A.- P. BROOMELL. THERMOSTATIG MEANS FOR OPERATING HOT AIR REGISTERS,

APPLIGATION FILED JULY '7, 1914.

Patented Mar. 23, 1915.-

1, 2 SHEETSSHBBT 2 ""'flIHIIII/IlflIfl/IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII A INVENTOR- A TTOBNEYS latter at predetermined temperature, and an tile liquid in such a manner that it begins expanding at about 65 F.

The upper thermostatic member 14 is charged to begin expanding at about ninety to one hundred degrees F. which temperature is always reached by the incoming warm air. The expansion of the upper thermostatic member has no effect on, the register gates, since the chain 16 will be merely slackened up when the upper thermostat is expanded. Let us now assume that the fire in the furnace goes down and that cold air is being discharged through the register. As soon as the temperature of this air drops below the point at which the upper thermostatic member will expand this thermostat will contract and by means of the chain con nection will pull the bar 8 and the weight 6 upwardly, thus closing the register and preventing the admission of cold air. so long-as the air in the register chamber is cold. When, however, the warm air begins to come in, the upper thermostatic member will begin to expand. I

In order that the register gates may be opened at the initial entrance of the warm air I provide a cut-away portion 10 in the upper gate sovthat even when the latter is closed the hot air may flow through and thus quickly warm the upper thermostat, so as to cause its expansion and thereby permit the opening of the register gates through the downward movement of the weight 6.

It will thus be seen that I have provided a device having register gates whichare positively operated by the movement of an individual thermostat connected with the gates so as to control the temperature of the room and in addition have provided an auxiliary thermostatic member for closing the gates when there is an abnormal decrease of tem- A perature, as for instance when the fire goes out. This automatic regulation therefore 4 provides for all the ordinary contingencies which may occur in the regulation of the temperature of a hot air heating system.

In a hot air heating system, a register provided with gates',athermostatic member connected with said gates for operating the auxiliary thermostatic member acting independently of said first-named thermostatic member for operating the register gates at an abnormally low temperature. I

2. In a hot air heating system, a register provided with gates, a thermostat connected with said gates for, causing the latter to open below a predetermined room temperature and to close at a higher temperature, and an auxiliary thermostatic member for causmg the closing of the register gates below the operating temperature of the first mentioned thermostatic member.

3. In a hot air heating system, a register provided with gates, a thermostat connected with said gates for causing the latter to open below a predetermined room temperature and to close at a higher temperature, and an auxiliary thermostatic member acting in dependently of said first-named thermostatic member for causing the closing of the register gates when cold air is passing out through the register.

4. In a hot air heating system having a register provided with pivoted gates, a common operating rod for moving said pivoted gates, a counterweight secured to said common operating rod, a thermostatic bellows disposed below said counterweight and arranged to engage the latter in its movement under expansion, the position of said counter weight being adjustable with respect to said thermostatic bellows.

5. In a hot air heatingsystem, a register -provided with movable gates, a thermostat temperature, and an auxiliary thermostat disposed in front of the register in the path of the incoming hot air, said auxiliary thermostat being operatively connected with the register gates for closing the latter when cold air is coming through the register.

6. In a hot air heating system, a register provided with pivoted gates, an operating rod for said pivoted gates, a counterweight carried by said common operating rod, a thermostatic member disposed below the register and arranged to engage said counterweight in its movement for opening and closing the gates at a predetermined temperature, an auxiliary thermostatic member disposed in front of the register in the path of the air coming through the register, and a flexible connection between said counterweight and said auxiliary thermostatic member, the contraction of said auxiliary member serving to raise the counterweight.

' Z. In a hot air heating system, a register prcv'ided' with gates, a main -thermostatic member, an auxiliary thermostatic member acting in conjunction with said main thermostatic member for operating the gates at a predetermined temperature,- said auxiliary thermostatic member acting independently of said main thermostatic member for oper ating the gates atan abnormally low tem 

